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Kernel: Make IDT Entries their one struct

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This is to make them a bit more transparent, and with a bit of Compiler
magic we get the 64-bit implementation in the same package
This commit is contained in:
Hendiadyoin1 2021-03-07 22:11:30 +01:00 • committed by Andreas Kling
parent 0d934fc991
commit 61240aaad3
2 changed files with 74 additions and 5 deletions
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14
Kernel/Arch/i386/CPU.cpp
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@ -58,7 +58,7 @@ extern FlatPtr end_of_ro_after_init;
namespace Kernel {
READONLY_AFTER_INIT static DescriptorTablePointer s_idtr;
READONLY_AFTER_INIT static Descriptor s_idt[256];
READONLY_AFTER_INIT static IDTEntry s_idt[256];
static GenericInterruptHandler* s_interrupt_handler[GENERIC_INTERRUPT_HANDLERS_COUNT];
@ -484,14 +484,18 @@ void unregister_generic_interrupt_handler(u8 interrupt_number, GenericInterruptH
UNMAP_AFTER_INIT void register_interrupt_handler(u8 index, void (*handler)())
{
s_idt[index].low = 0x00080000 | LSW((FlatPtr)(handler));
s_idt[index].high = ((FlatPtr)(handler)&0xffff0000) | 0x8e00;
// FIXME: Why is that with selector 8?
// FIXME: Is the Gate Type really required to be an Interupt
// FIXME: Whats up with that storage segment 0?
s_idt[index] = IDTEntry((FlatPtr)handler, 8, IDTEntryType::InterruptGate32, 0, 0);
}
UNMAP_AFTER_INIT void register_user_callable_interrupt_handler(u8 index, void (*handler)())
{
s_idt[index].low = 0x00080000 | LSW(((FlatPtr)handler));
s_idt[index].high = ((FlatPtr)(handler)&0xffff0000) | 0xef00;
// FIXME: Why is that with selector 8?
// FIXME: Is the Gate Type really required to be a Trap
// FIXME: Whats up with that storage segment 0?
s_idt[index] = IDTEntry((FlatPtr)handler, 8, IDTEntryType::TrapGate32, 0, 3);
}
UNMAP_AFTER_INIT void flush_idt()